Image 3 seems to be Rubiaceae plant. Probably Coffea sp.

The plant in image 3 may be Coffea arabica

Dear Arvind sir.

it is look like rauwolfia tetraphylla. i am attaching some more pictures for your reference.

Dear Jayaram Sir,

You are correct. The plant in image 3 Rauvolfia tetraphylla of family Apocynaceae.

Please post the reproductive parts of the plant depicted in image 1 & 2 for identification.

Good luck

Yes.I agree.

@ Respected Professor Bir Bahadur Sir,

Thank you Sir! Nice to see you answering on ResearchGate after a long time. Are you fine Sir?

Sir, Yes the 4th one is Rauwolfia tetraphylla of Apocynaceae ans First the images are looking like Morinda citrifolia of Rubiaceae. reproductive part needed for confirmation.

With regards

ASOK

Yes really third is Rauwolfia tetraphylla

Morinda citrifolia (Rubiaceae) is a good guess by Dr. Ashok Ghosh

Rauvolfia - dogbane family, Apocynaceae.